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Ecology Lesson 17: Competition 2

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what causes interspecific competition to be greater than intraspecific competition

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Date created

Mar 1, 2020

Cards (19)

Section 1

(19 cards)

what causes interspecific competition to be greater than intraspecific competition

Front

this means that there is some separation caused by some element in their life history. like eating different food or living different places etc (niche partitioning?)

Back

What two conditions must be true of the initial vampire growth rate for the vampires to take over? ------------ Define the basic reproduction number, what is the equation

Front

It must be positive! the ratio of rate of attack to rate of successful vampire hunting must be greater than 1 If these conditions are true, the vampire-free equilibrium is unstable ---------- R0 is the number of new vampires each existing vampire generates when the density of vampires/coffins is very low

Back

What is required for species to coexist?

Front

each species must limit itself more than the other species limits it. (interspecific competition is less impactful than intraspecific competition)

Back

total number of humans,vampires,coffins remains constant what does this mean for figuring out all three values? (Compartmental Model)

Front

(always just being converted between each other) You only need to find two.

Back

end of outbreak

Front

too many vampires and they are all caught before they find the final few humans there will always be a few humans that escape

Back

x-axis species read left and right y-axis species read up and down

Front

Back

the isoclines are the "equilibrium" values. If above/below the abundence will drift to the isocline

Front

Back

competitive exclusion

Front

Ecological rule that states that no two species can occupy the same exact niche in the same habitat at the same time

Back

abundence of two competing species will change according to the isoclines until they reach a point where two isoclines cross OR where an isocline and axis meet

Front

Back

what are alpha and beta?

Front

competition coefficent (previous lesson)

Back

Front

Back

which of the four ways of graphing two species isoclines produce competitive exclusion which of the four ways of graphing two species isoclines produce coexistance

Front

Back

more humans results in higher rate of conversion more vampires results in higher rate of conversion

Front

Back

The two trends that might happen depending on if the vampire infection takes hold early on or if it does not How does this relate to the vampire - free state? (Compartmental model)

Front

If the vampire population is able to increase initially, the vampire-free state was not a stable equilibrium If the vampire population simply decreases, the vampire-free state was a stable equilibrium state

Back

Since the R0 equation is different for different diseases what general truth can be drawn about the basic reproduction number regarding ability to spread?

Front

Back

The equation to find the maximum possible number of vampires before decrease begins (end of outbreak)

Front

Back

abundence of two competing species will change according to the isoclines until they reach a point where two isoclines cross OR where an isocline and axis meet

Front

Back

coexistance

Front

each species at abundance less than ther respective carrying capacities

Back

Why does having a basic reproduction number above 1 matter?

Front

It will allow the disease to outpace the mechanisms fighting it

Back